ELMWOOD, La. – The parents of a 2-year-old boy whose body was found in a plastic garbage bag near the Huey P. Long Bridge, which crosses the Mississippi River in Louisiana, have been arrested, Nola.com reports.

Gabrielle Whittington and Onterio Thompson, both 21, of St. Tammany Parish, were booked into the Jefferson Parish Jail Thursday on charges of unlawful disposal of human remains and obstruction of justice.

The Jefferson Parish Sheriff’s Office has not commented on the investigation since shortly after the body was found Wednesday evening along the 4900 block of River Road on the east bank of the Mississippi River levee.

Capt. Daniel Seuzeneau, a St. Tammany Parish Sheriff’s Office spokesman, said the sheriff’s office received a call Tuesday night from the boy’s grandmother, who was concerned about the toddler and told deputies she hadn’t seen him in several weeks.

Seuzeneau said deputies started the investigation late Tuesday night, leading them to Jefferson Parish, where “we believe this all happened.”

The coroner’s office said it could take weeks to positively identify the child. The coroner’s office gave a “circumstantial identification” and awaiting DNA tests to confirm the child’s identity.